我正在使用Java FX（类项目是必需的），并且正在努力格式化MVC，以便可以将多个视图加载到舞台（各种场景）上。我有一个Controller，如下所示，其中有2个View1实例。

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.animation.AnimationTimer;

public class Controller extends Application {

public int page = 0;

private View1 view2;
private View1 view1;

public static void main(String[] args) {
    launch(args);
}

@Override
public void start(Stage theStage) {
    view1 = new View1(theStage);
    view2 = new View1(theStage);
    new AnimationTimer() {
        public void handle(long currentNanoTime)
        {
            switch (page){
                case 0:
                    view1.update();
                    break;
                case 1:
                    view2.update();
                    break;
                default:
                    page = 0;
            }
            try {
                Thread.sleep(33);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }.start();
    theStage.show();
  }

}

问题发生在第view2 = new View1(theStage);行。没有此行，输出是带有背景图像的大画布。但是，没有那条线，它只是空白画布。下面是我的视图，我尽可能地简化了它，只是一张背景图像，以确定它是否正确加载。 （为了简化起见，我省略了导入，如果需要，我可以将其重新添加）

public class View1 {
Stage theStage;
Group root;
Scene theScene;
Canvas canvas;

// value of the height and width of screen
int canvasWidth = 1000;
int canvasHeight = 800; 

GraphicsContext gc;

Image background;

//View1 constructor initialize the starting position for the image
//Called in controller
public View1(Stage theStage) {


    this.theStage = theStage;
    this.theStage.setTitle("Estuary Game");

    root = new Group();
    theScene = new Scene(root);
    this.theStage.setScene(theScene);

    canvas = new Canvas(canvasWidth,canvasHeight);
    root.getchildren().add(canvas);
    gc = canvas.getGraphicsContext2D();

    background = createImage("assets/mini-game-1.png");
}

//Read image from file and return
private Image createImage(String image_file) {
    Image img = new Image(image_file);
    return img;
}

//method used to repaint on the image and called in controller
public void update() {
    // draw background and sharkMove such like current
    gc.drawImage(background,0);

}

}

我不确定我是否正确处理了多个视图，我的意图是只包含多个场景，但不确定如何构造它。任何帮助将不胜感激。